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https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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d4bf09480a
* Updated indentation in AVR_ATMega4809_Atmel_Studio and AVR_Dx_Atmel_Studio projects, plus small fixes in their readme files. * Added AVR_ATMega4809_IAR, AVR_ATMega4809_MPLAB.X, AVR_Dx_IAR and AVR_Dx_MPLAB.X demo projects. * Removed build artefacts and added .gitignore files in AVR_ATMega4809_MPLAB.X and AVR_Dx_MPLAB.X projects. Co-authored-by: Yuhui Zheng <10982575+yuhui-zheng@users.noreply.github.com>
102 lines
3.4 KiB
ArmAsm
102 lines
3.4 KiB
ArmAsm
/**
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* \file
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*
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* \brief Configuration Change Protection
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*
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(c) 2018 Microchip Technology Inc. and its subsidiaries.
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Subject to your compliance with these terms,you may use this software and
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any derivatives exclusively with Microchip products.It is your responsibility
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to comply with third party license terms applicable to your use of third party
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software (including open source software) that may accompany Microchip software.
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THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, WHETHER
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EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, INCLUDING ANY IMPLIED
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WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A
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PARTICULAR PURPOSE.
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IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE,
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INCIDENTAL OR CONSEQUENTIAL LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND
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WHATSOEVER RELATED TO THE SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS
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BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE
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FULLEST EXTENT ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN
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ANY WAY RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
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THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
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*
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*/
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/**
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* \defgroup doc_driver_system_protected_io Protected IO
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* \ingroup doc_driver_system
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*
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* \section doc_driver_protected_io_rev Revision History
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* - v0.0.0.1 Initial Commit
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*
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*@{
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*/
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//
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/*
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* GNU and IAR use different calling conventions. Since this is
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* a very small and simple function to begin with, it's easier
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* to implement it twice than to deal with the differences
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* within a single implementation.
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*/
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#if defined(__GNUC__)
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#include <assembler.h>
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PUBLIC_FUNCTION(protected_write_io)
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#ifdef RAMPZ
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out _SFR_IO_ADDR(RAMPZ), r1 // Clear bits 23:16 of Z
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#endif
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movw r30, r24 // Load addr into Z
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out CCP, r22 // Start CCP handshake
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st Z, r20 // Write value to I/O register
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ret // Return to caller
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END_FUNC(protected_write_io)
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END_FILE()
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#elif defined(__IAR_SYSTEMS_ASM__)
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#include <ioavr.h>
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PUBLIC protected_write_io
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RSEG CODE
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protected_write_io:
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# if !defined(CONFIG_MEMORY_MODEL_TINY) && !defined(CONFIG_MEMORY_MODEL_SMALL) \
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&& !defined(CONFIG_MEMORY_MODEL_LARGE)
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# define CONFIG_MEMORY_MODEL_SMALL
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# endif
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# if defined(CONFIG_MEMORY_MODEL_LARGE)
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ldi r20, 0
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out RAMPZ, r20 // Reset bits 23:16 of Z
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movw r30, r16 // Load addr into Z
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# elif defined(CONFIG_MEMORY_MODEL_TINY)
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ldi r31, 0 // Reset bits 8:15 of Z
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mov r30, r16 // Load addr into Z
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# else
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movw r30, r16 // Load addr into Z
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# endif
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# if defined(CONFIG_MEMORY_MODEL_TINY)
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out CCP, r17 // Start CCP handshake
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st Z, r18 // Write value to I/O register
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# elif defined(CONFIG_MEMORY_MODEL_SMALL)
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out CCP, r18 // Start CCP handshake
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st Z, r19 // Write value to I/O register
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# elif defined(CONFIG_MEMORY_MODEL_LARGE)
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out CCP, r19 // Start CCP handshake
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st Z, r20 // Write value to I/O register
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# else
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# error Unknown memory model in use, no idea how registers should be accessed
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# endif
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ret
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END
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#else
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# error Unknown assembler
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#endif
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